Valve-gear for explosion-engines.



3 SHEETS-SHEET 1 Ewe/"i22 PATENTED FEB. 20, 1906.

a Jrirf/l/QFI/ v M H. RICHTER. VALVE GEAR FOR EXPLOSION ENGINES. APPLICATION FILED AUG. 23, 1904.

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No. 813,116. PATENTED FEB. 20, 1906.

I H. RICHTER.

I VALVE GEAR FOR EXPLOSION ENGINES.

APPLICATION FILED AUG. 23. 1904.

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H. RIGHTER.- E

VALVE GEAR FOR EXPLOSION ENGINES.

APPLICATION FILED AUG. 23. 1904.

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IINITED s'rn'rns PATENT OFFICE.

HANS RICHTER, OF NURIEMBERG, GERMANY, ASSIGNOR TO THE FIRM OF VEREINIGTE MASOHINENFABRIK AUGSBURG UND MASCHINENBAU- GESELLSOHAFT NU'RNBERG A.Gr.,

Specification of Letters Patent.

OF NUREMBERG, GERMANY.

VALVE-GEAR FOR EXPLOSION-ENGINES.

Patented Feb. 20, 1906.

Application filed August 23 1904. Serial No. 221,863.

ing at Nuremberg, Bavaria, Germany, have invented new and useful Improvements in Valve-Gear for Explosion-Engines, of which the followingis a specification.

- This invention relates to a valve -motion for explosion and steam engines, in which the adjustable or passive roller-track and the active roller-lever are so arranged to one another that the time of openingof the valve alters with the load of the machine, while the closing time of the valve constantly remains the same, the arrangement being such that the active moving parts execute a steady movement determined by the driving mechanism and the position of the governor and in the downward movement of the valve only the parts rigidly connected with it taking part.

' In the drawings, Figure 1 shows the motion at the lowest position of the governor corresponding to the greatest machine-load at the beginning of the valve-lift, and Fig. 2 at the same position of the governor directly before the snapping. Fig. 3 shows the motion at the highest position of the governor correspondingto the smallest machine-load before snapping. In Fig. 4 is shown a slightlymoclified form of construction of the valvemotion at the lowest position of the governor and at the lowest position of the driving eccentric mechanism after the valve has already fallen, while the inner end of the active roller-lever is still in its highest position. Fig. 5 is a sectional view showing the device applied to an engine.

The passive roller-track or bearing-surface w has its inner end formed like a fork and is mounted in the valve-casing y, while its outer end is operated in any known mannerfor example, by means of arod r from the governor.

moves up and down in the valve-casing y. The dome of the latter contains the springs t and 0, which press the guide-piece q and the valve-head v downward. Inthe form of construction shown in Fig. 4 the spring '1', is arranged between the guides Z and the valvecasmg y.

On the pin p'a catch or pawl 7c is freely revoluble,which, either by means of a spring f or by a counterweight, has a constant tendency to lie against the nose n, fixed firmly on the active roller-lever b. The end of the catch or pawl forms a cylindrical track m concentric to the axis 19, which can slide on and under a cross-piece u, arranged in the valve-head c.

.the guide-piece g are raised, compressing the spring a, Fig. 1, or extending the same, Fig. 4. The catch k, loosely mounted on the pin p, takes part in the upward movement of this latter and comes against the cross-piece a, Fig. 1, and lifts the valve-head Q), the valverod, and the valve itself under compression of the spring 0. As the lever 1) rolls it also rotates. the catch 7c farther from under the crosspiece u until it is finally quite free, Figs. 2 and 3, whereupon the valve under the influence of the spring 0 and its own weight closes, Fig. 4. Only the valve-rod and the valvehead 1'; take part in the fall of the valve, while independently thereof the end of the rollerlever I), linked to the bolt p, completes its upward movement, Fig. 4, and gradually descends in proportion as the eccentric-rod e rises. At the same time the spring Q1 insures that the lever 1) remains in contact with the roller track or surface w. On the descent of the inner end of the lever b the catch is slides down laterally on the cross-piece u till the upper end of the insertion-piece m of the catch is has passed the lower edge of the insertion-piecem' of the cross-piece u, whereupon the spring f or the counterweight of the The nose at in consequence presses time the point about which both the catch 7c and the nose n rotate, it conveys its movement directly to the valve, so that no injurious lateral strains on the valve are produced.

I declare that what I claim is 1. In valve-motions for explosion-engines, the combination, of a passive roller-track w actuated by the governor and an active roller -lever 6 working upon said passive roller-track w and actuated by the eccentric-rod 6 with a catch 7c loosely mounted on a bolt p in the inner end of the active rollerlever b and adapted to come in engagement with a cross-piece u arranged in the head 22 of the valve-rod and to be brought out of engagement with said cross-piece u by a nose at fixed on the active roller-lever b, substantially as described.

2. In valve-motions for explosion-engines, the combination, of a passive roller-track w actuated by the governor and an active roller-lever b working upon said passive roller-track w and actuated by the eccentric-rod 6, with a catch 7c loosely mounted on a bolt p in the inner end of the active rollerlever b and adapted to come in engagement with a cross-piece u arranged in the head 12 of the valve-rod and to be brought out of en gagement with said cross-piece u by a nose at fixed on the active roller-lever b, the said bolt p being guided in slots of the head 12 of the valve-rod, substantially as described.

3. In valve-motions for explosion-engines, the combination, of a passive roller-track w actuated by the governor and an active roller-lever 1; working upon said passive roller-track w and actuated by the eccentric-rod e, with a catch 7c loosely mounted on a bolt p in the inner end of the active rollerlever b and adapted to come in engagement with a cross-piece u arranged in the head 12 of the valve-rod and to be brought out of engagement with said cross-piece u by a nose n fixed on the active roller-lever b, the said bolt p being guided by links Z, substantially as described.

4. In valve-motions for explosion-engines, the combination, of a passive roller-track w actuated by the governor and an active roller-lever 1) working upon said passive roller-track w and actuated by the eccentric-rod e, with a catch 7c loosely mounted on a bolt 1) in the inner end of the active rollerlever 17 and adapted to come in engagement with a cross-piece u arranged in the head 4) of the valve-rod and to be brought out of engagement with said cross-piece u by a nose at fixed on the active roller-lever b, and springs 01, f holding the active roller-lever b in contact with the passive roller-track w, and the catch 10 in contact with the nose n respectively, substantially as described.

5. In valve-motions for explosion-engines, the combination, of a passive roller-track w actuated by the governor and an active roller -lever 11 working upon said passive roller-track w and actuated by the eccentric-rod 6, with a catch k loosely mounted on a bolt 10 in the inner end of the active rollerlever 12 and adapted to come in engagement with a cross-piece u arranged in the head 'v of the valve-rod and to be brought out of engagement with said cross-piece u by a nose n fixed on the active roller-lever b, a spring t' holding the active roller-lever b in contact with the passive roller-track w, and a means for holding the catch is in contact with the nose n, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HANS RICHTER.

Witnesses:

MARTIN 'OFFENBAGHER, GEORGE E. BALDWIN. 

